Product Details
Synonym
FcRn, FCGRT & B2M
Source
Human FCGRT&B2M Heterodimer Protein, His Tag&Strep II Tag (FCM-H5286) is expressed from human 293 cells (HEK293). It contains AA Ala 24 - Ser 297 (FCGRT) & Ile 21 - Met 119 (B2M) (Accession # P55899-1 (FCGRT) & P61769-1 (B2M)).
Predicted N-terminus: Ala 24 (FCGRT) & Ile 21 (B2M)
Request for sequenceMolecular Characterization

Other Tags and Version Biotin & Other Labeled Version
Human FCGRT&B2M Heterodimer Protein, His Tag&Strep II Tag, produced by co-expression of FCGRT and B2M, has a calculated MW of 31.2 kDa (FCGRT) and 13.1 kDa (B2M). Subunit FCGRT is fused with a polyhistidine tag at the C-terminus and subunit Beta-2 microglobulin (B2M) is fused with Strep II-tag at the C-terminus. The reducing (R) protein migrates as 33 kDa (FCGRT) and 13 kDa (B2M) respectively due to glycosylation.
Endotoxin
Less than 1.0 EU per μg by the LAL method / rFC method.
Purity
>95% as determined by SDS-PAGE.
>90% as determined by SEC-HPLC.
Formulation
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4 with trehalose as protectant.
Contact us for customized product form or formulation.
Reconstitution
Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
Storage
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
- -20°C to -70°C for 12 months in lyophilized state;
- -70°C for 12 months under sterile conditions after reconstitution.
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Performance Data
SDS-PAGE

Human FCGRT&B2M Heterodimer Protein, His Tag&Strep II Tag on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 95%.
SEC-HPLC

The purity of Human FCGRT&B2M Heterodimer Protein, His Tag&Strep II Tag (Cat. No. FCM-H5286) was greater than 90% as determined by SEC-HPLC.
Bioactivity-ELISA

Immobilized Monoclonal Anti-Human CTLA-4 Antibody, Human IgG1 at 5 μg/mL (100 μL/well) can bind Human FCGRT&B2M Heterodimer Protein, His Tag&Strep II Tag (Cat. No. FCM-H5286) with a linear range of 1-78 ng/mL (Routinely tested).
Protocol
Immobilized Human FCGRT&B2M Heterodimer Protein, His Tag&Strep II Tag (Cat. No. FCM-H5286) at 5 μg/mL (100 μL/well) on a Nickel Coated plate can bind Monoclonal Anti-Human CTLA-4 Antibody, Human IgG1 with a linear range of 0.001-0.063 μg/mL (Routinely tested).
Protocol
Immobilized Human FCGRT&B2M Heterodimer Protein, His Tag&Strep II Tag (Cat. No. FCM-H5286) at 5 μg/mL (100 μL/well) on a Nickel Coated plate can bind Biotinylated Human IgG1 Fc, Avitag (Cat. No. IG1-H8213) with a linear range of 0.004-0.25 μg/mL (Routinely tested).
Protocol
Bioactivity-SPR

Immobilized Human FCGRT&B2M Heterodimer Protein, His Tag&Strep II Tag (Cat. No. FCM-H5286) on CM5 Chip via Anti-His antibody, can bind Herceptin with an affinity constant of 0.261 μM as determined in a SPR assay (Biacore T200) (QC tested).
Protocol

Immobilized Human FCGRT&B2M Heterodimer Protein, His Tag&Strep II Tag (Cat. No. FCM-H5286) on CM5 Chip, can bind Herceptin with an affinity constant of 1.19 μM as determined in a SPR assay (Biacore T200) (Routinely tested).
Protocol
Herceptin immobilized on CM4 Chip can bind Human FCGRT&B2M Heterodimer Protein, His Tag&Strep II Tag (Cat. No. FCM-H5286) with an affinity constant of 1.4 μM as determined in a SPR assay (Biacore 8K) (Routinely tested).
Protocol
Bioactivity-BLI

Loaded Human FCGRT&B2M Heterodimer Protein, His Tag&Strep II Tag (Cat. No. FCM-H5286) on SA Biosensor via Biotin his antibody, can bind Herceptin with an affinity constant of 0.27 μM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).
Protocol
Loaded Human FCGRT&B2M Heterodimer Protein, His Tag&Strep II Tag (Cat. No. FCM-H5286) on AR2G Biosensor, can bind Herceptin with an affinity constant of 0.35 μM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).
Protocol
Loaded Biotinylated Human Serum Albumin, His,Avitag (Cat. No. HSA-H82E3) on SA Biosensor, can bind Human FCGRT&B2M Heterodimer Protein, His Tag&Strep II Tag (Cat. No. FCM-H5286) with an affinity constant of 0.641 μM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).
Protocol
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Background
Recent Advances
- English Name:
IgG receptor FcRn large subunit p51
- Category:
- Approved Drugs:
3 Details
- Drugs in Clinical Trials:
4 Details
- Highest Development Stage:
Approved
















